Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

Open Access Open Access  Restricted Access Subscription Access
Open Access Open Access Open Access  Restricted Access Restricted Access Subscription Access

Occurrence of Hagiastrids in Chert Associated with Port Blair Series, South Andaman, India


Affiliations
1 National Geophysical Research Institute, Hyderabad 500007, India
 

   Subscribe/Renew Journal


Hagiastrids in chert (Radiolarian chert) associated with Port Blair Series of South Andaman is reported. A rich diversified and fairly well preserved assemblage of Hagiastrids representing 18 species are noticed. Comparison of these Hagiastrids assemblage of the chert from South Andaman with similar Hagiastrids from DSDP (Deep Sea DriHing Project) data suggest an early Cretaceous age for the former. Presence of chert as an inlier within the predominantly sedimentary sequence of Port Blair Series of Eocene age suggests major uplift/tectonic movement in Andarnan-Nicobar basin during Eocene time.
Subscription Login to verify subscription
User
Notifications
Font Size

Abstract Views: 194

PDF Views: 132




  • Occurrence of Hagiastrids in Chert Associated with Port Blair Series, South Andaman, India

Abstract Views: 194  |  PDF Views: 132

Authors

S. H. Jafri
National Geophysical Research Institute, Hyderabad 500007, India

Abstract


Hagiastrids in chert (Radiolarian chert) associated with Port Blair Series of South Andaman is reported. A rich diversified and fairly well preserved assemblage of Hagiastrids representing 18 species are noticed. Comparison of these Hagiastrids assemblage of the chert from South Andaman with similar Hagiastrids from DSDP (Deep Sea DriHing Project) data suggest an early Cretaceous age for the former. Presence of chert as an inlier within the predominantly sedimentary sequence of Port Blair Series of Eocene age suggests major uplift/tectonic movement in Andarnan-Nicobar basin during Eocene time.